Alps node architecture
Alps is operated by Swiss National Supercomputing Centre in Switzerland. This profile covers the documented compute inventory.
Cluster interconnect: HPE Slingshot 11 · 200 Gb/s per GPU. Topology: Not verified.
GH200
- Node count
- 2688
- CPU
- NVIDIA Grace · 72 cores
- CPUs per node
- 4
- Accelerator
- NVIDIA Hopper (GH200)
- Physical accelerators per node
- 4
- Host / unified memory
- 512 GB LPDDR5X
- Accelerator memory
- 96 GB HBM3 per GPU
- Local accelerator links
- NVLink
- CPU-to-accelerator link
- NVLink-C2C
- Storage
- Not verified
CPU · Rome
- Node count
- 1024
- CPU
- AMD EPYC 7742 · 64 cores
- CPUs per node
- 2
- Accelerator
- No accelerator
- Physical accelerators per node
- 0
- Host / unified memory
- 256 / 512 GB DDR (variant unspecified)
- Accelerator memory
- Not verified
- Local accelerator links
- Not verified
- CPU-to-accelerator link
- Not verified
- Storage
- Not verified
A100
- Node count
- 144
- CPU
- AMD EPYC · 64 cores
- CPUs per node
- 1
- Accelerator
- NVIDIA A100
- Physical accelerators per node
- 4
- Host / unified memory
- 128 GB
- Accelerator memory
- 80 / 96 GB (operator listing)
- Local accelerator links
- Not verified
- CPU-to-accelerator link
- Not verified
- Storage
- Not verified
MI300A
- Node count
- 128
- CPU
- AMD Zen 4 (MI300A)
- CPUs per node
- 4
- Accelerator
- AMD MI300A
- Physical accelerators per node
- 4
- Host / unified memory
- Not verified
- Accelerator memory
- Unified memory
- Local accelerator links
- Infinity Fabric
- CPU-to-accelerator link
- Not verified
- Storage
- Not verified
MI250X
- Node count
- 24
- CPU
- AMD EPYC · 64 cores
- CPUs per node
- 1
- Accelerator
- AMD MI250X
- Physical accelerators per node
- 4
- Host / unified memory
- 128 GB
- Accelerator memory
- Not verified
- Local accelerator links
- Not verified
- CPU-to-accelerator link
- Not verified
- Storage
- Not verified
Scope and uncertainty
Alps includes several node architectures. HPL ranking refers to the benchmarked system; the catalog includes all five operator-listed node types.
Not verified means a detail has not been confirmed in this catalog. Diagrams are schematic; node indices are illustrative, not physical hostnames. Data checked 13 September 2026.
Sources
Browse all cluster architecture pages →
CLUSTER